In my first job as a teacher I was also asked to speak at a meeting of prospective parents in the school Hall. By chance (or it was malice from my colleagues) and was the first to talk about my area of responsibility and I found myself in front of a rather squeaky and plausible sound system.
Chatted away, and do my bit in spite of the squeals and squawks and handed over to head of Sport, which deliberately stood next to the mic, announced the booming voice, "I don't need artificial AIDS," i went to look for the bit me to reinforce used turnips.
Not my finest moment, but the fact is that, for medium voice, it is difficult to be heard in the back of the Hall of the school, when it is full.
If you think about the speech day, sports day, swimming Gala, dance classes, or any situation where you have laryngitis, place if there is no multiplication, it is hopeless.
What I do, my school (I discovered after the first humiliation) was trying to obtain a rather cheap bits set that came from the far East, and it was not only once he completely while the head is good and addressing of the city on the day of the speech, in which we decided to get the system sorted once and for all.
Of course, different situations need different systems. And (i eventually got) system which can serve as the PA system at the event and you can change the speed of the music in my dance classes. (Head of Sport like the fact that I introduced the Dance to the Department of Sport-but was extremely popular-and finally even he admitted that the system helped gali swimming.)
But you don't need to go that far. There is Entertaina for up to 150 persons, US $ Entertaina Plus (which lets you play the CD, as well as Your by speaking into a microphone is ideal for sports events and the like). Which I managed to procure from its system of variable speed is Entertaina Plus PC 30.
However, there is always someone who is opposed to spending money, and in this case, the head of the Department decided to have one final, go for me. "How many decibels employs?" he asked, when I proposed the new system at a meeting of the staff.
In fact, been discussing the question, but because of, went and looked up decibels and it is a tool, which I discovered on. Does not have much in common with the amplification equipment, but it is very interesting.
140dB cause hearing
130dB over that it starts with a painful
128dB loudest Scream man recorded 2 m
Disco 120dB during standing near speakers
110dB Live band-can lead to loss of protectors for musicians
electrical or 100dB Close Southeast of the tractor passing through the
open top car 90dB ride on motorways or foods that are used by the mixer
80dB Very noisy alarm clock or kitchen waste disposal unit
Vacuum cleaner 70dB
normal conversation at 60dB 1 meter
50dB and quiet Office
40dB and the dripping faucet
30dB a whisper soft
20dB background sound broadcasting studios
10dB leaves rustling close by
0dB Threshold alarms
Now that you know.
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